Perhaps you should try some spelling variations:
tang luat » tang luan, hang luan, tong luan
cong cong » cong dong, trong cong, dung cong
theo chu » theo chieu, cho chu, chao chu
chu xanh » chu manh, chieu xanh, chua xang
cong tac » cong ty
tac toan » tap toan, tam toan, hach toan
toan tap » toan ban

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: theo chu xanh - hanh ((tang luat) OR (nang suat)) cong cong tac toan tap~.
• Adding a wildcard symbol may retrieve word variants: theo chu xanh - hanh ((tang luat) or (nang suat)) cong cong tac toan tap*.